a, \(\left(4x-3\right)\left(x-5\right)-2x\left(2x-11\right)\)
\(=4x^2-20x-3x+15-4x^2+22x\)
\(=-x+15\)
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Bài 3: Rút gọn phân thức
Các câu hỏi tương tự
a, 3x(4x-3)-(2x-1)(6x+5) b, 3x(x-1)²-2x(x+3)(x-3)+4x(x-4)
c, (x-1)³-(x-2)(x²-2x+4)+3(x+4)(x-4)
1,x^2+4x+4/2x^2-4x
2,x^2-2x/x^2-4
3,2x^2-2y^3
4,2-2a/a-1
5,2x+4/4-x^2
6,1-x^2/x^2-2x+1
7,3-x/x^2-9
8,2-x/x^2-4x+4
9,x^2-xy-x+y/4-4x+x^2
bài 1 : Rút gọn
8) x+3/x^2-3x
9) x-2/x-5÷(x-2)^2/x^2-25
10) 1÷(1-1/a)
11) (a+6/3a+9-1/a+3)÷a+2/27a
12) 6x+6/3x^2+3x
13) 3/x+3 -x-6/x^2+3x
14) (x/x+2+2/x-2+4x/x^2-4)×x^2-2x+4/x+2
[x-2]3-x[x+1] [x-1] +6x [x-3]
[x-2] [x2 -2x +4] [x+2] [x2 + 2x + 4 ]
[2x+y] [4x2 -2xy +y2 ] - [2x-y] [4x2 + 2xy + y2 ]
[x+y]3 - [x-y]3 - 2y3
Rút gọn phân thức:
1. 2x^2+4x/3x+6
2. 3x^2y^3/6xy
3. x^2 + 2x +1/2x+2
4. 9-x/x-9
5. -x^2+4/2x-4
a, [(x/x^2-25) - (x-5/X^2+5x)] : (2x-5/x^2+5x) + ( x/ 5-x)
b, [(9/x^3-9x) + (1/x+3)] : [(x-3/x^2+ 3x) - ( x/3x+9)]
c, (1/x-1) - (x^3-x/x^2+1) . [(x/x^2+1-2x) + (1/1-x^2)]
Cần gấp ạ
Chứng minh đẳng thức:
a, \(\left(\dfrac{3}{2x-y}-\dfrac{2}{2x+y}-\dfrac{1}{2x-5y}\right).\dfrac{4x^2-y^2}{y^2}=\dfrac{-24}{2x-5y}\)
b, \(\dfrac{x^2-x+1}{x^2+x}.\dfrac{x+1}{3x-2}.\dfrac{9x-6}{x^2-x+1}=\dfrac{3}{x}\)
(x+1/x+2 + 3/x2-1 - x+3/2x+2) 4x2
rút gọn phân thức
a.\(\dfrac{5x-15}{4x+4}:\dfrac{x^2-9}{x^2+2x+1}\)
b.\(\dfrac{6x+48}{7x-7}:\dfrac{x^2-64}{x^2-2x+1}\)
c.\(\dfrac{4x-24}{5x+5}:\dfrac{x^2-36}{x^2+2x+1}\)
d.\(\left(\dfrac{1}{x^2+x}-\dfrac{2-x}{x+1}\right):\left(\dfrac{1}{x}+x-2\right)\)